Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-1000-1111 pattern in any orientation.
A146689
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-1000-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =13a(6) =49a(7) =193a(8) =1049a(9) =4657a(10) =30659a(11) =227143a(12) =2543595a(13) =27086837a(14) =477421833a(15) =7701671605
External references
- oeis: A146689